Added multithreading and a task queue.
Fixed multithreading issues.
Added a deserializer for PojoItems.  Changed the storage object to PojoItem instead of String of type + json.
Factored out some internal classes.  Added (unfinished) collections implementation.
Added implementation of Collection<T> in PojoStickCollection.
Merge branch 'master' of https://github.com/arminhammer/PojoStick.git